text: /****************************************************************************
   * arch/arm/src/armv6-m/arm_vectors.c
   *
   *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Cloned from the ARMv7-M version:
   *
   *   Copyright (C) 2012 Michael Smith. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include "chip.h"
  #include "arm_internal.h"
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  #define IDLE_STACK      ((unsigned)&_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
  
  #ifndef ARMV6M_PERIPHERAL_INTERRUPTS
  #  error ARMV6M_PERIPHERAL_INTERRUPTS must be defined to the number of I/O interrupts to be supported
  #endif
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /* Chip-specific entrypoint */
  
  extern void __start(void);
  
  /* Common exception entrypoint */
  
  extern void exception_common(void);
  
  /****************************************************************************
   * Public data
   ****************************************************************************/
  
  /* The v6m vector table consists of an array of function pointers, with the
   * first slot (vector zero) used to hold the initial stack pointer.
   *
   * As all exceptions (interrupts) are routed via exception_common, we just
   * need to fill this array with pointers to it.
   *
   * Note that the [ ... ] desginated initialiser is a GCC extension.
   */
  
  unsigned _vectors[] __attribute__((section(".vectors"))) =
  {
    /* Initial stack */
  
    IDLE_STACK,
  
    /* Reset exception handler */
  
    (unsigned)&__start,
  
    /* Vectors 2 - n point directly at the generic handler */
  
    [2 ... (15 + ARMV6M_PERIPHERAL_INTERRUPTS)] = (unsigned)&exception_common
  };
  